Police have said it appears Williams fell in the driveway, and Haley fell as she tried to go call for help.

The sisters frequented Eats Restaurant in Seekonk, Massachusetts, several times a week, owner George Mihailides recalled Monday.

Mihailides said seeing the sisters always made him smile. He often asked them about the secret to a long life and he thinks their upbeat attitude was key.

"They were extraordinary," he said. "A real class act."

One of Haley's longtime neighbors also described her as upbeat and said she always looked forward to dinner dates with family and friends. Haley lived along the Providence River waterfront in Barrington for more than 60 years.

The twins had returned to Haley's home from dinner Friday night with their 89-year-old sister. The younger sister left the twins at some point before they fell, police said.